72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
//---
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//
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// gint core module: mpu
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//
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// Determines which kind of MPU is running the program. This module
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// provides macro tests isSH3(), isSH4(), and the identifier of the MPU,
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// which is stored in a global variable MPU_CURRENT and determined at
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// startup.
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//
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// If you need to do MPU-dependent jobs, use isSH3() or (possibly) isSH4()
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// instead of testing the value of MPU_CURRENT because these macros take
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// care of assuming unknown MPUs are SH4, which is the more reasonable
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// option.
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//
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// It is advised to always use the following alternative (which gint
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// does):
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//
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// if(isSH3())
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// {
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// ...
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// }
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// else
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// {
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// ...
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// }
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//
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//---
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#ifndef _MPU_H
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#define _MPU_H
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/*
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mpu_t
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This type holds information about the calculator's MPU.
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*/
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typedef enum
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{
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mpu_unknown = 0,
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// fx-9860G SH3.
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mpu_sh7337 = 1,
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// fx-9860G II SH3.
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mpu_sh7355 = 2,
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// fx-9860G II SH4.
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mpu_sh7305 = 3,
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// Just for reference (no calculator uses it).
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mpu_sh7724 = 4,
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} mpu_t;
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// Global MPU variable, accessible for direct tests. Initialized at the
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// beginning of execution.
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extern const mpu_t MPU_CURRENT;
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// Quick SH3 test. It is safer to assume that an unknown model is SH4 because
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// SH3-based models are not produced anymore.
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#define isSH3() (MPU_CURRENT == mpu_sh7337 || MPU_CURRENT == mpu_sh7355)
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#define isSH4() (!isSH3())
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//---
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// Public API.
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//---
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/*
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getMPU()
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Determines the MPU type and returns it. MPU_CURRENT is not updated.
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*/
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mpu_t getMPU(void);
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#endif // _MPU_H
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